European Physical Journal C: Particles and Fields European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2017, 77, pp.751. ⟨10.1140/epjc/s10052-017-5140-y⟩ The European Physical Journal C, 77 (11) The European physical journal / C 77(11), 751 (2017). doi:10.1140/epjc/s10052-017-5140-y European Physical Journal C: Particles and Fields, 2017, 77, pp.751. ⟨10.1140/epjc/s10052-017-5140-y⟩